Pochung Chen et al J. Stat. Mech. (2009) P10001 doi:10.1088/1742-5468/2009/10/P10001
Pochung Chen1, Chen-Yen Lai1 and Min-Fong Yang2
Show affiliationsBy means of the recently proposed algorithm based on the tensor product states, the magnetization process of the spin-1/2 antiferromagnetic XXZ model on a square lattice is investigated. In the large spin-anisotropy limit, clear evidence of a first-order spin–flip transition is observed as an external magnetic field is increased. Our findings of the critical field and the discrete jumps in various local order parameters are in good agreement with the quantum Monte Carlo data in the literature. Our results imply that this algorithm can be an accurate and efficient numerical approach in studying first-order quantum phase transitions in two dimensions.
E-print Number: 0905.4110
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75.10.Jm Quantized spin models
75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
Issue 10 (October 2009)
Received 10 September 2009, accepted for publication 14 September 2009
Published 1 October 2009
Pochung Chen et al J. Stat. Mech. (2009) P10001
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